ICALEO 2011 Paper #803 (Development of New Processes for Welding of Thermal Al-Cu Solar Absorbers using Diode Lasers)

Development of New Processes for Welding of Thermal Al-Cu Solar Absorbers using Diode Lasers
Authors:
Andre Springer, Laser Zentrum Hannover e.V.; Hannover Germany
Peter Kallage, Laser Zentrum Hannover e.V.; Hannover Germany
Michael Hustedt, Laser Zentrum Hannover e.V.; Hannover Germany
Stephan Barcikowski, Laser Zentrum Hannover e.V.; Hannover Germany
Volker Wesling, Laser Zentrum Hannover e.V.; Hannover Germany
Heinz Haferkamp, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at ICALEO 2011

Flat-plate solar collectors are favorable devices to generate heat from the energy of the sun. The central part of a collector, the s...

ICALEO 2011 Paper #802 (Stabilized Copper Welding by Using Power Modulated Green and IR Laser Beams)

Stabilized Copper Welding by Using Power Modulated Green and IR Laser Beams
Authors:
Andreas Heider, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Axel Hess, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Rudolf Weber, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Thomas Graf, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Presented at ICALEO 2011

Due to their material properties such as high electrical and thermal conductivity, copper materials are more and more demanded for industrial applications. The same material properties make laser welding of copper a challenging task. Welds in copper at low velocities (v < 10 ...

ICALEO 2011 Paper #709 (2D Finite Element Modeling of Heat Transfer and Fluid Flow during Multi Layered DMD Laser Process)

2D Finite Element Modeling of Heat Transfer and Fluid Flow during Multi Layered DMD Laser Process
Authors:
Simon Morville, LIMATB; Lorient Cedex France
Muriel Carin, LIMATB; Lorient Cedex France
Denis Carron, LIMATB; Lorient Cedex France
Philippe Le Masson, LIMATB; Lorient Cedex France
Patrice Peyre, PIMM; Paris France
Myriam Gharbi, PIMM; Paris
Cyril Gorny, PIMM; -
Remy Fabbro, PIMM; Paris France
Presented at ICALEO 2011

Derived from laser cladding, the Direct Metal Deposition (DMD) laser process is based upon a laser beam powder melt pool interaction, and enables the manufacturing of complex 3...

ICALEO 2011 Paper #708 (A CFD Model of Laser Cladding: From Deposition Head to Melt Pool Dynamics)

A CFD Model of Laser Cladding: From Deposition Head to Melt Pool Dynamics
Authors:
Juansethi Ibarra-Medina, The University of Manchester; Manchester Great Britain
Michael Vogel, The University of Manchester; Manchester Great Britain
Andrew J Pinkerton, The University of Manchester; Manchester Great Britain
Presented at ICALEO 2011

The laser metal deposition process continues to receive attention from researchers and industry due to its unique capabilities in applications such as surface coating or rapid manufacture. The development of numerical models has proven useful for improving the process. But nonetheless, most models have focused on analysing individual stages o...

ICALEO 2011 Paper #707 (Contribution on Modelling the Remote Ablation Cutting)

Contribution on Modelling the Remote Ablation Cutting
Authors:
Jan Musiol, Institute for Machine Tools and Industrial Management (iwb); Garching Germany
Markus Schweier, PRESENTER ONLY; -
Miachael Zeah, Institute for Machine Tools and Industrial Management (iwb); Garching Germany
Matthias Guertler, Technische Universitaet Muenchen (TUM); Garching Germany
Presented at ICALEO 2011

Remote Ablation Cutting (RAC) with continuous wave lasers holds a lot of untapped potential for laser material processing. High speed cutting for thin metal sheets and foils as well as box or tube processing without inside spatter contamination are only two benefits. In order to d...

ICALEO 2011 Paper #702 (Numerical Simulation of Heat Transfer and Fluid Flow During Laser Metal Wire Deposition)

Numerical Simulation of Heat Transfer and Fluid Flow During Laser Metal Wire Deposition
Authors:
Marcus Edstorp, University West; TrollhäTtan Sweden
Presented at ICALEO 2011

The object of the research project on which the following article reports, is to develop a numerical simulation model which predicts the geometry of a component manufactured by robotized laser metal wire deposition (RLMwD). These simulations are meant to assist in process planning and optimization. The work is carried out under the assumption that the flow of liquid metal exercises a significant influence on the shape of each bead, and thus also on the entire deposit.

Here we present a 3D time dynamic finite element mod...

ICALEO 2011 Paper #701 (Modeling of Real Temporally Variant Beam Shapes in Laser Materials Processing)

Modeling of Real Temporally Variant Beam Shapes in Laser Materials Processing
Authors:
Jonathan Griffiths, University of Liverpool; Liverpool Great Britain
Stuart P. Edwardson, University of Liverpool; Liverpool Great Britain
Geoff Dearden, University of Liverpool; Liverpool Great Britain
Ken G. Watkins, University of Liverpool; Liverpool Great Britain
Presented at ICALEO 2011

The ability to incorporate real, temporally variant intensity distributions is key to improving the accuracy of Finite Element (FE) models of laser processes. The work presented in this paper uses Laser Forming as a process example. Laser forming (LF) offers the industrial promise of...

ICALEO 2011 Paper #606 (Dissimilar Metal Joining of Magnesium Alloy to Zinc-Coated Steel by Laser Welding-Brazing Process)

Dissimilar Metal Joining of Magnesium Alloy to Zinc-Coated Steel by Laser Welding-Brazing Process
Authors:
Liqun Li, Harbin Institute of Technology; Harbin Peoples Republic of China
Caiwang Tan, Harbin Institute of Technology; Harbin Peoples Republic of China
Yanbin Chen, Harbin Institute of Technology; Harbin Peoples Republic of China
Presented at ICALEO 2011

In automobile industry, there is a strong driving force for reducing the weight of car body by using hybrid structural body parts for improving fuel efficiency and decreasing air pollution. As one of solutions, the dissimilar combination of magnesium alloy and steel tends to be effective for the car body to save ...

ICALEO 2011 Paper #605 (Application of Keyhole and Heat-Conduction Modes to Laser Dissimilar Metals Welding of Magnesium Alloy and Steel)

Application of Keyhole and Heat-Conduction Modes to Laser Dissimilar Metals Welding of Magnesium Alloy and Steel
Authors:
Mohamed Wahba, Osaka University; Osaka Japan
Yousuke Kawahito, Joining and Welding Research Institute; Ibaraki, Osaka Japan
Seiji Katayama, Joining and Welding Research Institute; Ibaraki, Osaka Japan
Presented at ICALEO 2011

Reduction in vehicles weight has become an urgent need due to environmental and economic concerns. One efficient strategy to answer this need is the use of light weight materials such as magnesium alloys in the manufacturing of vehicles components. But this would necessitate the development of reliable welding techniques to fab...

ICALEO 2011 Paper #604 (Recent Developments in Laser Joining of Dissimilar Materials)

Recent Developments in Laser Joining of Dissimilar Materials
Authors:
Claus Thomy, BIAS- Bremer Institut fur Agewandte Strahltechnik GmbH; Bremen Germany
Frank Vollertsen, BIAS- Bremer Institut fur Agewandte Strahltechnik GmbH; Bremen Germany
Presented at ICALEO 2011

Currently, the use of hybrid structural elements from dissimilar materials is intensively discussed. Primary aim is to reduce weight and maintain or increase mechanical properties and structural performance. In special, the joining of aluminium to steel is of particular interest for the transportation industries such as car production or shipbuilding. So far, a wide variety of laser- and arc-based processes was investi...